The pollen grain is related to the embryo sac as

• (a) Male gametophyte is to the egg
• (b) Male gametophyte is to the female gametophyte
• (c) Sperm is to the egg
• (d) Sperm is to the female gametophyte

The relationship between the pollen grain and the embryo sac can be understood through the roles they play in plant reproduction. The pollen grain represents the male gametophyte, while the embryo sac contains the female gametophyte. Therefore, the correct answer is:

Correct Answer

(b) Male gametophyte is to the female gametophyte

Explanation

The pollen grain develops into the male gametophyte, which produces sperm cells. The embryo sac, on the other hand, is the structure that houses the female gametophyte, including the egg cell. This relationship is crucial for fertilization in flowering plants.

Key Points

• Pollen grains are responsible for delivering sperm to the egg.
• The embryo sac is where fertilization occurs.
• This interaction is essential for the formation of seeds.